Service is defined as the submission of a beneficiary to his benefactor, which he expresses, by repaying him — to the best of his ability — for the favor he received from him.

The first type is that submission to HaShem which is prompted by an external stimulus, for it follows from the phenomenon of reward and punishment in this world and the next. The second type of submission, however, is submission which is prompted by a stimulus embedded in the mind and implanted in the nature of one when their body and soul join together.

Both types of submission are praiseworthy and lead to the way of salvation in the world of repose. One of them, however, — the submission prompted by the Torah — leads to the other, serves as a step by which we ascend to the other. The submission which is prompted by the inner urging of the mind and by rational demonstration is preferred by HaShem and more acceptable, for seven reasons.